Improvement in sewing-machines



J. ROWE.

SEWING MACHINE. I

Patentd Dec 27",.1859.

UNITED STATES JAMES ROWE, or CINCINNATI, OHIO, ASSIGNOR ro HIMSELF AND MARTIN B. EwiNe, 0F SAME PLAoE- V PATENT OrFIc IMPROVEMENT INSEWING-MACHINES.

Specification forming part of Letters Patent No. 26,638, dated December 27, 1859.1:

To all whom it may concern:

Be it known that I, JAMES Rows, of Oincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Sewing-Machines; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, and made to form a part of .this specification. r

The nature of my invention relates to certainimprovements in sewing-machines, by means of which I am enabled to construct a sewing-machine which will be simple, durable, and fully efficient in every particular, at a muchless cost than that of. ordinary machines that form a similar stitch.

In reference to the accompanying drawings, Figure 1 is aperspective view, Figs. 2 and 3 are bottom views, Fig. 4' is a side, elevation, Fig. 5 isfan end elevation, and Fig. 6 is a sectional view, of the machine. Fig.- 7 represents side and top views of the 'looper. Fig. 8 is a side elevationof the device for operating the, feeder. Fig. 9 is a top View of aportion of the bar which operates the feeder.

A represents the bed-plate of the machine. A is an arm secured upon the top of the bedplate, upon which the post or head B for holding the needle and pressure bars is arranged. B is a bent lever pivoted to the arm A at a, and passing downward through the plate A, where it is formed with a slot, a, which is adapted to receive the crank or pin b of the driving-wheel b,-by m'eans of which, through themedium of said lever B, the needle-bar c and needle 0 .may be operated.

d is a'spoolframe attached to the arm A.

d is a tension-post attached to the arm A, formed witha cap or shoulder, 01, and provided with a nut, e, which is made to turn upon the screw-thread of the post d, and also with a spiral spring, 6, and cup e, which is formed to fit the shoulder d. The thread e from the spool'i is made to pass through the post d below the shoulder d, so that by turning the nut 'e' any desired tension may be secured to thethread'eW. J I i f is a spring" attached to the arm Aat f, and, extending therefrom beyond the postd,

is adapted to regulate properly the slack thread between the said post d and the needle a during the operation of sewing.

The pressure-barf and needle-bar c are arranged within the head or post B, as is usual in like machines, the pressure-bar f being formed with a foot, f, which is adapted to bear upon the cloth, and provided with a spring, 9, by means of which the said foot is held down upon the cloth, and with a lever, g, bymeans of which the said barf may be raised when it may be desired to'move the cloth.

.h (fully shown in Figs. 2 and 3) is a bar attached to the lever B below the bed-plate A, so that it is made to vibrate as the lever is operatedbymeans of'th'e crank-wheel b b.

The said bar It is provided with three piiis, h i h" h, and formed with a slot, 11, for the reception of rod j. k is a bent-lever pivoted upon the under side of plate jA at A, the end It being bent, andto pass between pins h h of bar h, so that as said bar is made to vibrate the said lever-k is made to operate in such manner as to give reciprocating motion to the looper l. The said bar It isprovided with a spring, 1, which is, made to' bear against the looper, as shown in Figs. 2 and 3, in such manner as to hold the looper 1 from the needle, or prevent it from striking against the needle as the machine ismade to operate.

. Z is an adjustable guide formed with aslot, l, and is also' arranged to bear against the looper, as represented, and is secured upon the lever k, and also adjustable by means or the set-screw m, so that the .looper I may always be made to approach and leave the me erence to the looper l and needle 0 in such manner as to hold the point of thelooper in the e v eases proper position for the needle to enter the loop, and by means of this cam precision and certainty ineifecting the loop and'forming the stitch may be secured.

o is a lever, pivoted to the plate A at 0, the.

' nor that the camsp 11 may be made to im-.

pin'ge against the pins 7:. h" of the bark at the proper time to operate the feeder t, so that the cloth may be movedwhile the needle is raised above it.

' u is a screw arranged to pass through the pin 71, and thereby to impinge against the cam p when it may be required to form longer stitches, greater vibration being thereby impart'edto the-lever o and longer strokegiven to the feeder t.

j is a bent rod, which is provided with an inclined plane, j, and made to pass through the slot z" of the bar h, where it is secured by means of I screw j, and also through the guidepieee a of plate A by means of the screw j. Thesaid rod j' may be so adjusted that the inclinedplane j may be made to bear upon the feeder at. any desired time in the operation of the machine, so that the feeding ofnthe cloth may beacc'omplished at the precise moment necessary to the perfect working of the machine. The feedert is made in the form of a spring, so that 'it may be free from the cloth, except when acted upon by the said inclined .planej', and it is adjusted, 'asis usual in sewing-machines, so as to operate upon the cloth through the slot t of the needle-plate n, and

it may be properly secured by means of the bracket 1 of plate A.

Having described the construction of my invention, its operation maybe set forth as follows: The driving-wheel I), being made to rotate by means of a band running overpulley o, the arm B, needle-bar c, needle 0, and vibratory bar h will be operated, as before described, the machine being made to operate from that position of its .parts shown in Fig. 2, in which the vibratory bar h is at the extremity of its backward motion. As the machine continues to operate and the bar h to move forward, the pin h is made to impinge against the bent portion k of levers k, and thereby operate' the forward end of said lever in such manner as to force the looper forward. During this operation the needle is being withdrawn by the upward motion of the forward end of lever B, so that when the point of the looper arrives at the needle the loop of the needle will be in proper position to receive the point of the looper. The machine continuing to operate, the looper will be forced forward, its point will impinge against the cam n, and thereby be forced forward in the direction of the needle 0. At this period in theoperation of the machine the needle will be withdrawn free from the cloth. The pink now impinges against the cam p of the bar 1), before described,

by means of which the levero will be operated in such manner as to forcethe feeder forward at thesame time the inclined plane of the rod j is made to bear upon the feeder, thereby causing the feeder to press against the cloth between it and the foot ffof the pressurebar f", so that the cloth may be fed the proper distance for one stitch, vwhile the needle is free from it. The bar it is now at the extremity of its forward motion; The

machine continuing to operate, the-needle is again forced to enter the cloth. The rod j is withdrawn by the backward motion of the bar h, so that the inclined plane j willnot press upon the feeder. The said feeder now'being free, the pin it impinges against the cam 12, by

means of which the feeder will be retracted. The needle, having again passed through, ar-- rives at the proper position to pass through the loop of-the looper Z before the point of 1 said looper has been retracted from the cam n, thereby rendering it certain that the needle must pass through said loop. The pin h now impinges against the bent portion L of the lever 70, thereby operating the said lever is in such manner as to retract the looper, thereby taking up the slack of the thread m and giv' ing the under chain of the stitch sufficient' tension for practical sewing, the upward motionof the needle being sufficient to. givethe thread e' sufficient tension to form a perfect stitch upon the upper side of the cloth. In case the feeder t is made to act too soonor too late for the perfect operation of the machine the screws 9 will be loosened, and thescrewrod 8 operates so as toadjust thebar p in such manner that thepins h 7:. may rock the cams, p p at the proper time to render the action of the feeder perfect, and should longer stitches be required than those formed by the natural action of the cams p'p", the screw it will be turned so that the camp may act upon the point of said screw it instead of pin h, thereby giv-f ing greater lateral motion to the forward end of lever 0' and greater'stroke, to the feeder t, by means of which the cloth maybe fed in such a manner that stitches of any required length maybe formed.

I do not .wish to be understood as claiming anything for the mode of operating the nee die-bar, or of securing tension tothe upper thread, as I am aware that similar devices are in common use for like purposes; but I Havingdescribed the construction and operation of my invention, what I claim as my invention, and desire to secure by Letters Patent, is-- 'l l he bar or bracket h on the lower end In testimoriy of which inventionIheve hereof the needle-bar, so that it shall drive, in unto set my hand in presenceof witnesses.

combination, the looper-ba-r k k and the feed- 1 ing-levers j and 0, by positive movement, JAMES ROWE when it is driven by the crank-pin I), all 01)- Witnesses:

erating in the manner and for the purpose set H. E. CLIFTON, forth. v F. A. MCDOWELL. 

